Extension tool



FIG. 1 is a right, front, top perspective view of an extension tool showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a right, front, bottom perspective view of the extension tool thereof;

FIG. 9 is a right, front, top perspective view showing the extension tool in a second environment use thereof;

FIG. 10 is a right, front, bottom perspective view thereof;

FIG. 11 is a right, front, top perspective view showing the extension tool in a third environment use thereof; and,

FIG. 12 is a right, front, top perspective view showing the extension tool in a fourth environment use thereof.

The broken lines represent environment that forms no part of the claim. The dot-dashed line in the figures defines the boundary and forms no part of the claimed design. 

CLAIM We claim the ornamental design for an extension tool, as shown and described. 